Wow, you have a very beautiful system and have invested some *very* serious money into it. However, I think you are following the path of simply using money - and lots of it - to improve the system's sound quality by buying very expensive equipment and cables. It's a good start, but you are no where near what you could have.
You would be well advised to employ the use of a professional acoustician and have him give you ideas for improving the sound of that system in that room. I am not a pro, but I can tell you that you are already making some very basic mistakes:
1) Having all that reflective equipment in between your speakers is very bad if you wish to have pinpoint imaging and a credible soundstage.
2) What I can see of then room indicates that it is very hard and reflective. Judicious use of acoustic panels, bass traps, floor coverings, etc. would go a long way towards taming what is probably a sonic nightmare.
Again, I highly recommend you contact a firm that does room tuning and get someone in there to help you with your room. The best gear in the world is all for naught if the room is not up to par...
-RW-
